Class IX

Air shows the property of
  1. N2
  2. O2
  3. Both (a) and (b)
  4. None of these
The particles of a suspension will be of size ________
  1. than 1nm (nm = nano metre)
  2. between 1nm to 100 nm
  3. greater than 100nm
  4. less than 0.1 nm
Brass is a solution of molten copper in
  1. solid zinc
  2. molten zinc
  3. gaseous zinc
  4. molten tin
If we burn graphite,
  1. residue will be left
  2. no residue will be left
  3. it will not burn
  4. it will change into diamond.
In sugar solution,
  1. Sugar is solute, water is solvent
  2. Sugar is solvent, water is solute
  3. Both are solutes
  4. Both are solvents.
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